CN102830959A - Dynamic expanding method and system for embedded browser interface - Google Patents

Dynamic expanding method and system for embedded browser interface Download PDF

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CN102830959A
CN102830959A CN201110162134XA CN201110162134A CN102830959A CN 102830959 A CN102830959 A CN 102830959A CN 201110162134X A CN201110162134X A CN 201110162134XA CN 201110162134 A CN201110162134 A CN 201110162134A CN 102830959 A CN102830959 A CN 102830959A
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interface
application
browser
library
dynamic
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CN102830959B (en
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胡琳琳
孙鹏
邓峰
刘春梅
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Institute of Acoustics CAS
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Abstract

The invention provides a dynamic expanding method and a system for an embedded browser JavaScript interface. The method comprises the following steps that: step 1, the browser expands an application support interface, an application library loading interface and an application library unloading interface of a JavaScript engine in a static manner; step 2, a service provider develops a plurality of application interfaces required by services of the service provider and compiles codes of developed interfaces into dynamic library files in a binary form, and stores the dynamic library files in a memory of the browser through the application library loading interface; and step 3, when the browser parses the application support interface in a page frame, and searches for entrance addresses of the application interfaces of the service provider in the memory of the browser by the interface, if so, executing a program of the application support interface to dynamically expand the JavaScript interface of the browser based on the services. The application support interface is the JavaScript interface expanded by the browser for searching for the entrance addresses of the interface program with an appointed interface name. If the entrance addresses are found, the application interface is expanded.

Description

Embedded browser interface dynamic expansion method and system
Technical Field
The invention relates to the technical field of browsers, in particular to a dynamic expansion method and a dynamic expansion system for an embedded browser interface.
Background
At present, an embedded browser is widely applied to various information appliances and portable network terminals such as Internet-TV, iDVD, Web terminals, digital television set-top boxes, home gateways, palmtop computers, and the like, and as a middleware, the embedded browser is not only used for portal navigation, but also has the functions of Internet content reception, User Interaction (UI), video service navigation, service support, and the like.
To support rapid deployment of various services, browsers must have an extensible interface to service applications. The traditional design method is a static extended JavaScript engine, namely, when browser software is released, the JavaScript object and the method are designed. If a new function is added to the service application, the kernel code of the browser needs to be modified, the JavaScript object or method needs to be expanded again, and then the browser running library is downloaded to the set-top box after recompilation and test. The method has complex steps and long modification period, and cannot respond to the change of the demand quickly, and the browser must be upgraded to expand the function of a new service every time a new service is added, so that the browser is bound with the specific service, which does not accord with the principle that the browser is used as a middleware to carry out application development.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, aiming at the JavaScript interface of an embedded browser, a static expansion mode is adopted, so that the steps are complicated, the modification period is long, the quick response to the change of the requirement cannot be made, the browser is required to be upgraded to expand the new service function when a new service is added, the browser is bound with the specific service, and the like, thereby providing a dynamic expansion method and a dynamic expansion system for the embedded browser interface.
The invention provides a dynamic expansion method of a JavaScript interface of an embedded browser, which comprises the following steps:
step 1, the browser expands an application support interface, an application library loading interface and an application library unloading interface of the JavaScript engine in a static mode.
And 2, developing a plurality of application interfaces required by a certain service provider, and compiling codes of the developed interfaces into dynamic library files in a binary form.
And 3, storing the dynamic library file into the memory of the browser by using an application library loading interface according to the starting of the service by an upper application program or a service page.
And 4, when the browser resolves the application supporting interface in the page, searching entry addresses of a plurality of application interfaces of the service provider in the memory of the browser by using the interface, and if the entry addresses are found, executing a program of the application interfaces, namely realizing dynamic expansion of the JavaScript interface of the browser based on the service.
Wherein,
the application supporting interface is a JavaScript interface expanded by the browser, the application supporting interface can be called by a page, the application supporting interface searches an entry address of an interface program with a specified interface name from a dynamic library of a browser memory according to the interface name of an interface developed by a service provider, and if the entry address is found, the application supporting interface is expanded;
the application library loading interface and the application library unloading interface are interfaces extended by a browser, and the application library loading interface loads dynamic library files of a service provider into a memory of the browser; the application unloading interface is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
In the above technical solution, the step 4 is followed by the following steps:
when the user quits the service, the user releases the browser memory occupied by the dynamic library of the service provider by using an application library unloading interface through an upper application program or a service page; the application library unloading interface is an interface of browser extension, and the interface is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
The application library loading interface and the application library unloading interface can be simultaneously replaced by an upper application library loading interface and an upper application library unloading interface respectively; the upper application library loading interface is an interface expanded by a browser and is used for loading a dynamic library file of a service provider into a memory of the browser; the upper application library unloading interface is an interface extended by the browser and is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
And the upper application program of the calling browser loads and unloads the binary codes of the application interfaces of the service provider extension by using the upper application library loading interface and the application library unloading interface when the service is started or closed.
Based on the method, the invention also provides a dynamic expansion system of the JavaScript interface of the embedded browser, and the system comprises: a browser containing a JavaScript engine, an upper application program module and a service application interface unit,
the JavaScript engine in the browser further comprises: the system comprises an application support interface, an application library loading interface and an application library unloading interface;
the application support interface is used for searching an entry address of an expansion interface corresponding to the interface name in the dynamic library file from the browser memory according to the interface name parameter and executing an interface program; the application library loading interface stores the dynamic library file of the application interface of the service provider into the memory of the browser; the application library unloading interface releases a browser memory occupied by a dynamic library file of a service provider;
the upper application module further comprises: an upper application library loading interface and an upper application library unloading interface; the upper application library loading interface is used for storing the dynamic library file of the application interface of the service provider into the memory of the browser; the upper application library unloading interface is used for releasing a browser memory occupied by a dynamic library file of a service provider application interface;
the browser is also provided with a memory unit for storing a dynamic library file in a binary form, which is compiled by a plurality of JavaScript interface codes required by a certain service provider to carry out the service according to an extended interface specification;
and the application support interface searches an address pointer of the program in the memory of the browser according to the name of an interface program developed by a service provider.
In the above technical solution, the application library loading interface further includes: and the parameter receiving module is used for receiving the path of the dynamic library file or the file list of the service provider. The input parameters of the application library uninstalling interface comprise: and the service provider dynamic library file or the path of the file list. The input parameters of the upper application library loading interface comprise: and the service provider dynamic library file or the path of the file list. The input parameters of the upper application library uninstalling interface comprise: and the service provider dynamic library file or the path of the file list.
The method has the advantages that the JavaScript analysis engine and the service function use the application support interface as a bridge, when the service function is updated, corresponding functions are added to the service module only according to the interface design specification, the service and the JavaScript engine of the browser are not bound, the expansion of the interface does not need to modify the browser, the browser does not have subsequent workload, the browser is liberated from the long-term maintenance of the static expansion interface, the service expansion is convenient, and the upgrading and deployment are quick. In addition, the method dynamically loads the service library, so that the consumption of resources is reduced. The method solves the defect of the static extended JavaScript engine, and can quickly extend the interface of the service provider application.
Drawings
FIG. 1-a is a flow chart of a dynamic expansion method of an embedded browser interface according to the present invention;
FIG. 1-b is a flow chart of another embedded browser interface dynamic expansion method of the present invention;
FIG. 2 is a block diagram of the embedded browser interface dynamic extension system of the present invention;
fig. 3 is a flowchart illustrating dynamic extension operation of a JavaScript interface of an embedded browser according to an embodiment of the present invention.
Detailed Description
The embedded browser JavaScript interface dynamic extension method of the present invention is further described below with a specific embodiment.
The browser statically expands an application library loading interface, an application library unloading interface and an application support interface in a JavaScript engine in advance, and expands an upper application library loading interface and an upper application library unloading interface; the method comprises the steps that an application interface required by a service is compiled into a binary dynamic library file by a service provider, an application supporting interface of a browser is called when a service related interface needs to be executed when a service page is manufactured, a service interface name and required parameters corresponding to the service are used as parameters, the required interface parameters are related to interface functions, the required parameters of different interfaces are different, and the required parameters are determined by the service interface and are used as input parameters to be provided for the application supporting interface. When the application supporting interface is used, the business interface name in the input parameters is used for searching the address of the interface program corresponding to the business interface name in the memory, and if the business interface name is found, the business interface address pointer is used for executing the business interface. And secondly, returning a return value after the execution of the service interface is finished to the page by the application support interface. And finally, when the service is closed, the binary dynamic library file of the interface program compiled by the service provider in the memory is unloaded by using the application library unloading interface expanded by the browser.
The dynamic loading and unloading of the dynamic library file codes of the service provider by the browser can adopt the following two methods:
in the first mode, the upper application program uses the upper application library loading interface extended by the browser to load the dynamic library of the service provider into the memory before accessing the service page of the service provider, and uses the upper application library unloading interface to release the occupied memory before exiting the service page of the service provider.
In the second mode, a JavaScript application library loading interface expanded by a browser is used in an application page of a service provider to load a dynamic library file code of the service provider into a memory before the service interface of the service provider is used, and a JavaScript application library unloading interface is used to release the occupied memory before the service page of the service provider exits.
The invention provides a dynamic expansion method of an embedded browser interface, which comprises the following steps:
(1) expanding an application support interface in a JavaScript engine in a static expansion mode;
(2) and expanding an application library loading interface and an application library unloading interface in the JavaScript engine. And simultaneously expanding an upper application library loading interface and an upper application library unloading interface in the upper application program interface. The application library loading and unloading interface in the JavaScript is used for page calling, and the application library loading and unloading interface in the upper application program interface is used for directly calling the program of the upper calling browser;
(3) the service provider or the service provider develops the JavaScript interface of the service according to the extended interface specification and compiles the JavaScript interface into a dynamic library in a binary form, and the JavaScript interfaces of different services can be independently developed, so that the deployment of new services can be accelerated;
(4) if the upper application program loads the dynamic library of the service provider, when the service is started, loading all dynamic libraries of JavaScript related to the service into a memory of the browser by using an upper application library loading interface; when the service exits, using the upper application library unloading interface to release the resources occupied in the memory;
(5) if the service provider service page loads the service provider application dynamic library, loading the service provider application binary code into the browser memory by using a JavaScript application library loading interface before using the service interface of the service provider in the service page of the service provider, namely, before using the interface in the service provider dynamic library; releasing resources occupied in the memory by using a JavaScript application library unloading interface when the service provider application page exits;
the method described above can be further broken down into the following two implementations, which are described below with reference to fig. 1-a and 1-b and related figures.
As shown in fig. 1-a, the figure is a flowchart of a dynamic expansion method of a dynamic embedded browser interface according to the present invention; the method comprises the following steps:
step 1, a browser extension application support interface, an upper application library loading interface and an upper application library unloading interface.
And 2, the service provider develops a code of the new service interface and compiles the code into a dynamic library in a binary form.
And 3, calling an upper application program of the browser to load the dynamic library file memory in the binary form into the memory of the browser by using the upper application library loading interface.
And 4, when the browser resolves the application supporting interface in the page, dynamically and respectively searching entry addresses of a plurality of interfaces of the service provider in the memory of the browser by using the interface.
And 5, calling an interface function according to the entry address and realizing the dynamic expansion of the browser interface.
As shown in fig. 1-b, this figure is a flowchart of another dynamic expansion method of dynamic embedded browser interface of the present invention, and the method includes the following steps:
step 1, the browser expands an application support interface, an application library loading interface and an application library unloading interface.
And 2, the service provider develops a code of the new service interface and compiles the code into a dynamic library in a binary form.
And 3, loading the dynamic library file in the binary form into the memory of the browser by the service page by using an application library loading interface.
And 4, when the browser resolves the application supporting interface in the page, dynamically and respectively searching entry addresses of a plurality of interfaces of the service provider in the memory of the browser by using the interface.
And 5, calling an interface function according to the entry address and realizing the dynamic expansion of the browser interface.
If the address of the entrance of the service interface program is found, the service interface program is called to complete the processing of the relevant events of the service; namely, the problem of dynamic interface loading of the browser is realized.
FIG. 2 is a block diagram of the dynamic expansion system of the embedded browser interface according to the present invention; the dynamic browser interface extension system comprises: the system comprises a browser containing a JavaScript engine, an upper application program module and a business application interface module.
The browser comprising the JavaScript engine is used for expanding an application support interface, an application library loading interface and an application library unloading interface. Simultaneously, an upper application library loading interface and an upper application library unloading interface are expanded in the upper application program interface; the browser is also provided with a memory for storing a program of an application interface developed by a service provider;
the application supporting interface searches an address pointer of an interface program in the memory of the browser according to the name of the program developed by a service provider;
the application library loading interface is used for loading a dynamic library into a browser memory by a service page according to a storage path of a dynamic library file or a file list provided by the service provider; the application library unloading interface corresponds to the application library loading interface and is used for releasing the interface program stored in the memory;
the upper application library loading interface and the upper application library unloading interface are used for loading a dynamic library into a browser memory by an upper application program according to a storage path of a dynamic library file or a file list provided by the service provider; the upper application library unloading interface corresponds to the upper application library loading interface and is used for releasing the interface program stored in the memory;
examples
As shown in fig. 3, the embedded os in this embodiment is a Linux os.
Step 1, using an application support interface Stbservice.CallApp of dlsym extended JavaScript to realize searching a corresponding service provider service interface pointer in a service dynamic library loaded into a memory. Therefore, the browser has an open dynamic management interface when being released, and has the capability of dynamic expansion.
Step 2, the browser uses a Linux system function dlopen to realize the loading of an upper application library loading interface LoadService, the parameters are configuration file paths of all JavaScript dynamic libraries including service needs, and all dynamic libraries in the configuration file are loaded into a memory after the interface is called; and (3) realizing the UnLoadservice of the upper application library unloading interface by using dlclose, and releasing the occupied memory.
And 3, developing a service interface of the service provider or the service provider, and compiling the service interface into the so dynamic library.
And 4, the upper application program records all JavaScript dynamic libraries required by the service into a configuration file, and the configuration file uses an XML format.
And 5, when the service provider makes a page, calling an application support interface Stbservice.CallApp of the extended JavaScript at a service interface needing to be called, wherein the parameters are the name of the corresponding service interface and the required parameters.
Step 6, when the relevant service is started, the upper application program uses an application library loading interface LoadService to load all dynamic libraries relevant to the service into a memory; and when the service exits, releasing the resources occupied in the memory by using an upper application library unloading interface UnLoadservice.
And 7, the browser enters a service webpage of the service provider, and the JavaScript engine analyzes the webpage to an open application support interface Stbservice.
And 8, acquiring the service interface name and the parameters of the service provider service from the Stbservice.
And 9, searching an entry point pointer of the service interface in the loaded service provider dynamic library by the Stbservice.
And step 10, if the entry address is found, calling a service interface to complete the processing of the relevant event of the service. And 11, returning to the application support interface after the service interface is executed, and returning an execution result to the page by the application support interface.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A dynamic expansion method for a JavaScript interface of an embedded browser comprises the following steps: step 1, the browser expands an application support interface, an application library loading interface and an application library unloading interface of a JavaScript engine in a static mode;
step 2, a certain service provider develops a plurality of application interfaces required by the service, and compiles codes of the developed interfaces into a dynamic library file in a binary form;
step 3, storing the dynamic library file into a memory of the browser by an upper application program or a service page according to the starting of the service by using an application library loading interface;
step 4, when the browser resolves the application supporting interface in the page, the interface is used for searching entry addresses of a plurality of application interfaces of the service provider in the memory of the browser, if the entry addresses are found, the program of the application interfaces is executed, and therefore the JavaScript interface of the browser is dynamically expanded based on the service;
wherein,
the application supporting interface is a JavaScript interface expanded by the browser, the application supporting interface can be called by a page, the application supporting interface searches an entry address of an interface program with a specified interface name from a dynamic library of a browser memory according to the interface name of an interface developed by a service provider, and if the entry address is found, the application supporting interface is expanded;
the application library loading interface and the application library unloading interface are interfaces extended by a browser, and the application library loading interface loads dynamic library files of a service provider into a memory of the browser; the application unloading interface is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
2. The method for dynamically extending the JavaScript interface of the embedded browser of claim 1, wherein the step 4 is followed by the steps of:
when the user quits the service, the user releases the browser memory occupied by the dynamic library of the service provider by using an application library unloading interface through an upper application program or a service page;
the application library unloading interface is an interface of browser extension, and the interface is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
3. The embedded browser JavaScript interface dynamic expansion method of claim 1, wherein the application library loading interface and the application library unloading interface are simultaneously replaced by an upper application library loading interface and an upper application library unloading interface, respectively;
wherein,
the upper application library loading interface is an extended interface of the browser and is used for loading the dynamic library file of the service provider into the memory of the browser;
the upper application library unloading interface is an interface extended by the browser and is used for releasing dynamic library resources of the browser memory occupied by the dynamic library file of the service provider.
4. The embedded browser JavaScript interface dynamic expansion method of claim 3, wherein the upper application program that invokes the browser uses the upper application library loading interface and the application library unloading interface to load and unload binary codes of the application interface extended by the service provider when the service is started or closed.
5. A dynamic expansion system of a JavaScript interface of an embedded browser comprises: a browser containing a JavaScript engine, an upper application program module and a service application interface unit,
the JavaScript engine in the browser further comprises: the system comprises an application support interface, an application library loading interface and an application library unloading interface;
the application support interface is used for searching an entry address of an expansion interface corresponding to the interface name in the dynamic library file from the browser memory according to the interface name parameter and executing an interface program; the application library loading interface stores the dynamic library file of the application interface of the service provider into the memory of the browser; the application library unloading interface releases a browser memory occupied by a dynamic library file of a service provider;
the upper application module further comprises: an upper application library loading interface and an upper application library unloading interface; the upper application library loading interface is used for storing the dynamic library file of the application interface of the service provider into the memory of the browser; the upper application library unloading interface is used for releasing a browser memory occupied by a dynamic library file of a service provider application interface;
the browser is also provided with a memory unit for storing a binary dynamic library file compiled by a plurality of JavaScript interface codes required by a certain service provider for carrying out the service according to the extended interface specification.
6. The dynamic expansion system for the JavaScript interface of the embedded browser according to claim 5, wherein the application support interface searches an address pointer of an interface program developed by a service provider in the memory of the browser according to the name of the program.
7. The embedded browser JavaScript interface dynamic extension system of claim 5, wherein the application library loading interface further comprises: and the parameter receiving module is used for receiving the path of the dynamic library file or the file list of the service provider.
8. The embedded browser JavaScript interface dynamic extension system of claim 5, wherein the application library uninstall interface input parameters comprise: and the service provider dynamic library file or the path of the file list.
9. The embedded browser JavaScript interface dynamic extension system of claim 5, wherein the input parameters of the upper application library loading interface comprise: and the service provider dynamic library file or the path of the file list.
10. The embedded browser JavaScript interface dynamic extension system of claim 5, wherein the input parameters of the upper application library uninstall interface comprise: and the service provider dynamic library file or the path of the file list.
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CN114116048A (en) * 2021-11-10 2022-03-01 北京乐驾科技有限公司 Method and device for realizing lightweight of mobile equipment application program
CN114116048B (en) * 2021-11-10 2023-12-01 北京乐驾科技有限公司 Method and device for realizing light weight of mobile device application program

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